基于LTE WLAN融合网络上行MU MIMO共调度方案

为了提升系统吞吐及频谱效率，IEEE802．11ax工作组引入了上行M U‐M IM O技术。然而现行上行 M U‐MIMO由于AP轮询调度依次询问的机制存在用户不足及AP空等问题。为解决此问题，基于LTE‐WLAN融合网络，在C‐RAN架构下利用系统间共调度，当产生上述问题时，将用户数据灵活地由LTE网络卸载至WLAN网络下，并提出优化的WLAN上行MU‐MIMO传输方案及时结束AP等待，从而有效的补充用户不足并极大减少AP空等时间。文章最后利用仿真证明所提共调度方案可显著提升WLAN上行MU‐MIMO的信道容量及系统平均吞吐量，证明了所提方案的优越性及有效性。

Co scheduling uplink MU MIMO approach in LTE WLAN aggregated networks

In order to increase the throughput and fully use wider bandwidth ,the IEEE 802 .11ax task group introduces UL‐MU‐MIMO .However ,the UL‐MU‐MIMO is not specifically addressed ,due to the complexity of user scheduling . Recently ,heterogeneous networks have been widely discussed ,and the research on C‐RAN provides the flexibility to the offloading between LTE and WLAN .In this paper ,we propose a co‐scheduling model for UL MU‐MIMO based on the heterogeneous network scenario .Simulation results show that the proposed approach significantly improves the capacity and average throughput of the UL MU‐MIMO in WLAN networks .